Agaseous compound containing hydrogen and carbon is decomposed and found to contain 85.63% c and 14.37% h by mass. the mass of 258 ml of the gas, measured at stp, is 0.646 g. what is the molecular formula of the compound?

If you add 10ml of hot water to 10ml of cold water and the change in tempature 8°c calculate how much energy is gained by the cold water

Use the drop-down menus to answer each question. which runner finished the 100 m race in the least amount of time? which runner stopped running for a few seconds during the race? at what distance did anastasia overtake chloe in the race?

What happens when light is scattered?